<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type @click="showAddrole">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1===0?'bdtop':'','vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级 -->
              <el-col :span="19">
                <!-- 渲染二级权限 -->
                <el-row
                  :class="[i2===0?'':'bdtop','vcenter']"
                  v-for="(item2,i2) in item1.children "
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                      type="sucess"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
                               {{scope.row}} 
            </pre>-->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showedit(scope.row)"
            >编辑</el-button>
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRole(scope.row.id)"
            >删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-search"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="showSetRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightlist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
    <!--添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="showAddRoleDialogVisible"
      width="30%"
      @close="showAddRoleDialogVisible=false"
    >
      <el-row>
        角色名称
        <el-input v-model="addinfo.roleName"></el-input>
      </el-row>
      <el-row>
        角色描述
        <el-input v-model="addinfo.roleDesc"></el-input>
      </el-row>

      <span slot="footer" class="dialog-footer">
        <el-button @click="showAddRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addrole">确 定</el-button>
      </span>
    </el-dialog>
    <!--编辑角色对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="showeditRoleDialogVisible"
      width="30%"
      @close="showeditRoleDialogVisible=false"
    >
      <el-row>
        角色名称
        <el-input v-model="editRole.roleName"></el-input>
      </el-row>
      <el-row>
        角色描述
        <el-input v-model="editRole.roleDesc"></el-input>
      </el-row>

      <span slot="footer" class="dialog-footer">
        <el-button @click="showeditRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editrole">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //控制分配权限的对话框
      showSetRightDialogVisible: false,
      //所有的权限数据
      rightlist: [],
      //树形控件绑定
      treeProps: {
        label: "authName",
        children: "children",
      },
      //默认选中的分配权限的id
      defKeys: [],
      //当前即将分配权限的角色ID
      roleId: "",
      //添加角色
      addinfo: { roleName: "", roleDesc: "" },
      //添加角色的对话框
      showAddRoleDialogVisible: false,
      //修改角色
      editRole: {
        roleName: "",
        roleDesc: "",
        id: "",
      },
      showeditRoleDialogVisible: false,
    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
      // console.log(this.rolelist);
    },
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm(
        "此操作将永远删除，是否继续？",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消删除了");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      //获取权限
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限失败");
      }
      //权限数据保存到data
      this.rightlist = res.data;
      //   console.log(this.rightlist);
      //递归三级权限节点
      this.getLeafKeys(role, this.defKeys);
      this.showSetRightDialogVisible = true;
    },

    //通过递归的形式 获取角色下所有三级权限的ID，并保存给defKeys
    getLeafKeys(node, arr) {
      //如果当前节点不包含children 则不是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    //监听权限关闭对话框
    setRightDialogClosed() {
      this.defKeys = [];
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      const idStr = keys.join(",");

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败");
      }
      this.$message.success("分配权限成功");
      this.getRoleList();
      this.showSetRightDialogVisible = false;
    },
    //添加角色对话框
    showAddrole() {
      this.showAddRoleDialogVisible = true;
    },
    //确定添加角色
    async addrole() {
      if (this.addinfo.roleName.trim() === "")
        return this.$message.error("角色名称不能为空");
      const { data: res } = await this.$http.post("/roles", this.addinfo);
      if (res.meta.status !== 201) {
        return this.$message.error("添加失败");
      }
      this.$message.success("添加成功");
      this.getRoleList();
      this.showAddRoleDialogVisible = false;
      this.addinfo.roleName = "";
      this.addinfo.roleDesc = "";
    },
    //修改角色
    showedit(info) {
      this.editRole.roleName = info.roleName;
      this.editRole.id = info.id;
      this.editRole.roleDesc = info.roleDesc;
      this.showeditRoleDialogVisible = true;
    },
    //确定修改
    async editrole() {
      if (this.editRole.roleName.trim() === "")
        return this.$message.error("角色名称不能为空");
      const { data: res } = await this.$http.put("/roles/" + this.editRole.id, {
        roleName: this.editRole.roleName,
        roleDesc: this.editRole.roleDesc,
      });
      if (res.meta.status !== 200) {
        return this.$message.error("修改失败");
      }

      //关闭对话框 刷新数据 提示成功
      this.showeditRoleDialogVisible = false;
      this.getRoleList();
      this.$message.success("修改成功");
    },
    //删除
    async removeRole(id) {
      //弹框询问是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      //如果用户点击确定，返回字符串confirm
      //取消删除。返回字符串cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const { data: res } = await this.$http.delete("roles/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("删除失败");
      }
      this.$message.success("删除成功");
      this.getRoleList();
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>